• 간호행정학회지
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• 제17권4호
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• pp.474-483
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• 2011

Purpose: This study was conducted to identify factors affecting nurses' burnout in secondary general hospitals. Methods: Data were collected through structured questionnaires from 241 nurses working at the secondary general hospitals with below 400 beds in the P, C, and S city between April and May, 2009. Data analysis was done with independent t test, ANOVA, Pearson correlation coefficient, and multiple stepwise multiple regression with SPSS WIN v 17.0. Results: Burnout was significantly different according to religion, age, clinical experiences, and shift work. Burnout score of the subjects was 58/100. Burnout of the subjects were positively correlated with job stress and negatively correlated with hardness, self efficiency, self esteem, spiritual wellbeing, social support, and job satisfaction. The explained variances for burnout was 51.8% and factors affecting nurses' burnout in secondary general hospitals were job stress, hardness, self efficiency, job satisfaction and shift work. Conclusion: These results showed the significant factors fo nurses' burnout in secondary general hospitals. These findings can be utilized to development of strategies for reducing job stress and enhancing hardness, self efficiency and job satisfaction.

• 수면정신생리
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• 제12권1호
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• pp.11-16
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• 2005

Sleep can be easily disrupted by variety of conditions. Most of medical illnesses could be a primary condition causing secondary insomnia. The common underlying mechanism of secondary insomnia is presumed to be stress effects on sleep. The assessment and treatment of secondary insomnia are often complicated. Establishing an causal inference between primary condition and insomnia is the key to assessment. However, it can be difficult even for experienced clinicians due to diagnostic ambiguity of secondary insomnia. Therefore, through medical evaluation and integrative understanding of primary condition is essential to manage secondary insomnia properly. Although treatment have been usually focused on the primary medical illnesses per se, nonpharmacologic interventions, such as sleep hygiene, might be effective in many cases.

• Nuclear Engineering and Technology
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• 제29권4호
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• pp.310-319
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• 1997

A finite element analysis of a trunnion pipe anchor is presented. The structure is analyzed for the case of internal pressure and moment loadings. The stress results are categorized into the average (membrane) stress, the linearly varying (bending) stress and the peak stress through the thickness. The resulting stresses are interpreted per Section III of the ASME Boiler and Pressure Vessel Code from which the Primary(B$_1$), Secondary(C$_1$) and Peak(K$_1$) stress indices for pressure, the Primary (B$_2$), Secondary(C$_2$) and Peak(K$_2$) stress indices for moment are developed. Based on the comparison between stress value by stress indices derived in this paper and stress value represented by the ASME Code Case N-391-1, the empirical equations for stress indices are effectively used in the piping stress analysis. Therefore, the use of empirical equations can simplify the procedure of evaluating the local stress in the piping design stage.

• 한국자동차공학회논문집
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• 제6권4호
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• pp.121-128
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• 1998

In this study, when tension and bending stress act on plate simultaneously, stress intensity factor is analyzed at crack tip with using BEM(Boundary Element Method). In this analysis, stress intensity factors(S.I.F) are defined for variable ligament, aspect and stress ratio($\sigma$T/$\sigma$B). Consequently, predicted that crack grow to depth direction at low aspect and ligament ratio in tension stress and to surface direction in bending stress. Tension and bending stress act on plate same time, effect of tension stress in the first stage and effect of bending stress in the after stage was to observed. The outbreak of secondary crack in backside is under the control of stress amplitude and predict that the point of outbreak is mear backside.

• 전산구조공학
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• 제9권3호
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• pp.115-123
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• 1996

배관을 구속시키기 위한 원통형 배관 지지대(Trunnion Pipe Support)가 부착된 배관의 응력해석을 위하여 유한요소해석을 사용하였다. 해석결과로 부터 얻어진 응력은 두께에 대한 평균(막응력) 및 선형 응력(굽힘응력)으로 분류되었으며, 분류된 응력값은 압력에 에 의한 일차응력계수(B/sub 1/)와 이차응력계수(C/sub 1/), 모멘트에 의한 일차응력계수(B/sub 28/, B/sub 2T/)와 이차응력계수(C/sub 28/, C/sub 2T/)를 추정하기 위하여 ASME Code에 정의된것과 일치하게 해석되었다. 무차원의 함수로써 응력계수에 대한 경험식을 개발하기 위하여 여러 모델의 해석을 수행하였다.

• 한국농공학회지
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• 제34권E호
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• pp.45-59
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• 1992

At downstream part of the hydraulic structures such as spiliway or drainage gate, jet flow can occur by gate opening. If stream bed is not hard or bed protection is not sufficient, scour hole will be formed due to high shear stress of the jet flow. We call this primary scour. Once the scour hole is formed, a vortex occurs in it and this vortex causes additional scour. We call this secondary scour. The primary scour proceeds to downstream together with flow direction but the secondary one proceeds to upstream direction opposite to it. If the secondary one continues and reaches to the hydraulic structure, it can undermine the bottom of hydraulic structure and this will lead to failure of structure itself. Thus, it is necessary to know the physical features of the vortex structure in a scour hole, which is the main mechanism of the secondary scour. This study deals with the characteristics of the vortex structure and its shear stress which causes the secondary scour.

• Journal of Microbiology and Biotechnology
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• 제25권11호
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• pp.1787-1795
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• 2015

The transition from primary to secondary metabolism in antibiotic-producing Streptomyces correlates with expression of genes involved in stress responses. Consequently, regulatory pathways that regulate specific stress responses are potential targets to manipulate to increase antibiotic titers. In this study, genes encoding key proteins involved in regulation of the osmotic stress response in Streptomyces avermitilis, the industrial producer of avermectins, are investigated as targets. Disruption of either osaB_Sa, encoding a response regulator protein, or osaC_Sa, encoding a multidomain regulator of the alternative sigma factor SigB, led to increased production of both oligomycin, by up to 200%, and avermectin, by up to 37%. The mutations also conditionally affected morphological development; under osmotic stress, the mutants were unable to erect an aerial mycelium. In addition, we demonstrate the delivery of DNA into a streptomycete using biolistics. The data reveal that information on stress regulatory responses can be integrated in rational strain improvement to improve yields of bioactive secondary metabolites.

• 성인간호학회지
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• 제29권3호
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• pp.290-301
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• 2017

Purpose: This study was aimed to identify the level of emotional labor, job stress and professional quality of life and to identify the factors affecting on professional quality of life among nurses in long-term care hospitals. Methods: 136 nurses working at eight different long-term care hospitals were recruited from May 1 to June 30, 2016. Data were analyzed by descriptive statistics, t-test, ANOVA, Pearson correlation, and stepwise multiple regression using SPSS/WIN 22.0. Results: Professional quality of life is consisted of three subcategories as compassion satisfaction, secondary traumatic stress and burn-out. As for the factors affecting on compassion satisfaction, age, satisfaction on working ward and shift pattern of duties were significant factors. The three variables' explanation power on compassion satisfaction was 25.0%. As for factors affecting on secondary traumatic stress, emotional labor was a significant factor. The emotional labor's explanation power on secondary traumatic stress was 13.0%. Factors affecting on burn-out, emotional labor, age, and health condition were significant factors. The three variables' explanation power on burnout is 31.0%. Conclusion: On the basis of results, program development are required to relieve emotional labor and job stress for nurses at long-term care hospitals and to improve their professional quality of life.

• 한국직업건강간호학회지
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• 제27권2호
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• pp.109-120
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• 2018

Purpose: The aims of this study were to examine the work, client, and personal environments of community health practitioners, including the level of their professional quality of life (ProQOL), and identify the factors affecting their ProQOL. Methods: Data were collected using a web-survey questionnaire, which was completed by a sample of 308 community health practitioners currently working in Korea. The questionnaire included items on ProQOL; three dimensions labeled compassion satisfaction, burn out, and secondary traumatic stress; job stress; job satisfaction; sense of community; and general characteristics. Results: The mean scores for the three dimensions were $39.2{\pm}6.44$ (compassion satisfaction), $31.9{\pm}3.59$ (burn out), and $26.4{\pm}5.05$ (secondary traumatic stress). A multiple linear regression revealed that compassion satisfaction varied significantly according to the satisfaction with job choice, sense of community, job stress, and job satisfaction. The factors affecting burn out were sense of community and work load, while the factors affecting secondary traumatic stress were education, job stress, and job satisfaction. Conclusion: The findings of this study suggest that comprehensive intervention focusing on improving the sense of community and job satisfaction and reducing job stress is essential to promote community health practitioners' ProQOL.

• 간호행정학회지
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• 제18권3호
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• pp.320-328
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• 2012

Purpose: Professional quality of life is the quality one feels in relation to their work as a helper. The purpose of this study was to describe professional quality of life among emergency nurses. Methods: A total of 15 emergency rooms were selected in three cities. Among 263 nurses working at these emergency rooms, 178 nurses consented to participate in this cross-sectional survey. Professional Quality of Life (ProQOL) Scale version 5 was used to measure compassion satisfaction, burnout and secondary traumatic stress. Cluster analysis was used to classify nurses according to professional quality of life. Results: The mean scores (SD) for compassion satisfaction, burnout, and secondary traumatic stress were 32.12 (5.45), 28.27 (4.28), and 28.20 (5.07), respectively. The result of cluster analysis according to standardized score of compassion satisfaction, burnout, and secondary traumatic stress yielded three clusters. Over 50% of participants showed low professional quality of life. Nurses who were included in a cluster representing low professional quality of life were younger, had shorter periods of nursing experience, and perceivedlower social support than other cluster. Conclusion: Education or support programs for emergency nurses are needed to enhance their professional quality of life.